Stairway



P. RIESECK.

(No Model.)

STAIRWAY.

No. 412,898. Patented 001;. 15,1389.V

Mmmm

UNITED STATES PATENT OFFICE..

PETER RIESECK, OF ALLEGHENY, PENNSYLVANIA.

STAI RWAY.

SPECIFICATION forming part of Letters Patent No. 412,898, dated October 15, 1889.

Application filed June 13, 1887. Serial No. 241,222.- (No model.)

To all whom it may concern:

Be it known that I, PETER RIESECK, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Stairways; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this speciiica tion.

My invention relates to an improvementin stairways, and has for its object a means for accommodating and facilitating the descent of a large number of persons. This I accomplish by constructing two separate and independent stairways about a suitably-constructed central column, in a manner that will be fully described hereinafter.

In the accompanying drawings, Figure 1 is a side elevation of a portion of my improved stairway constructed in accordance with my invention. Fig. 2 is a continuation of the same. Fig. 8 is a plan view taken on the line m a', Fig. 1. Fig. 4 is a plan view of the top landing.

To put my invention into practice, I employ a supporting-column, which in the present instance I have shown as consisting of four uprights a, which are placed equidistant from one another in the form of a square. From the base of this column I construct a stairway h upward to a platform c and provided with an inner d and outer hand-raile,wl1ich, by means of properly-constructed balusters f, support the outer extremity of the treads. The inner hand-rails are bent around and secured to the columns, so as to form additional supports to the iiights of stairs. From this platform c the stairway b is continued upward along the rear of the columns a to a similar platform c; thence upward along the opposite side of the starting-point to the platform c2. From this platform the stairway is continued upward along the front of the columns a to the platform cB and from this point to the balcony g, attached to the wall of the building. In a structure of but two stories in height this stairway l? ends at the first. I

now commence a similar stairway h on the opposite side of the columns a, the entrance of which is in an opposite direction to that before described. This stairway lt is continued upward about the columns a, from one landing t' to the other or next above, until the second balcony g or story is reached.

In order to avoid the danger of obstructing the stairways at the base, I arrange the entrances or exits of the two stairways at the base of the column at opposite ends of the same diagonal of the column; or, in other words, the entrance or exit of the stairway h at the base of the column is at one end of a diagonal line indicated by the dotted line y in Fig. 3, while the corresponding entrance or exit` of the other stairway b at the base of the column is at the opposite end of said diagonal. (See Fig. 3.) By thus arranging the entrances or exits of the two stairways at the base of the column the persons beginning the ascent or descent of one of the stairways will not in terfere with or obstruct the persons at the base of the other stairway. It will also be noted that the two stairways are entirely separate and independent, that they wind around the common supporting-column in the same direction, and that the landings of said stairways are at widelyseparated points, whereby the danger of a crush or jam of the persons occupying the two stairways s avoided.

If the building is of three stories, the iirstdescribed stairway b is continued from the first landing to the third, which in case of a fire would serve to empty the iirst and third iioors while the other is being used by the second. If constructed for a four or more story building, the two stairwaysb 7i land alternatelymas, for example, in a seven-story building the irst-described stairway b lands at the first, third, fifth, and seventh stories, and the other h at the second, fourth, and sixth stories.

It will be seen by reference to Figs. 1 and 2 of the drawings that the two stairways are entirely separate and independent and Wind in a series of flights at right angles to each other and in the same direction about the columns a, and having platforms at each angle.

Having thus described my invention, I do IOO not confine myself to the peculiar construcin a number of different Ways; but

What I claim, and desire to secure by Letters Patent, is-

l. In a stairway, the combination, with the .supporting-columns, of two sets of stairs composed of flights arranged at right angles to each other around the columns and provided With platforms at the angles, substantially as specified.

2. The combination, in a stairway, of the supportingcolumns, the iights extending around the columns and arranged at right angles to each other, and the platforms located at the angles of the flights, the upper platforms of each flight being arranged to connect with different stories of a building, substantially as specified.

3. The combination, in a stairway, of the supportingoolumns, the independent stair- Ways located on opposite sides of the columns and consisting of a series of ights at right angles to each other, anda series of platforms at the angles of the iiiglits, the iiights and platforms being provided With hand-rails and balusters, the inner hand-rail being bent around and secured to the columns, substantially as specified.

PETER RIEsEoK.

Witnesses:

M. E. HARRISON, W. C. BARR. 

